Question

How much energy does an electric hair dryer use if it draws 8.3 amps of current when using 120 volts for 5.0 minutes?

Answer 1

Answer: The energy drawn by electric hair dryer is 2,98,800 J

Explanation:

To calculate the power of the electric hair dryer, we use the equation:

$P=I\times V$

where,

P = power of electric hair dryer

I = Current of electric hair dryer = 8.3 A

V = voltage of electric hair dryer = 120 V

Putting values in above equation, we get:

$P=8.3\times 120=996W$

To calculate the energy of electric hair dryer, we use the equation:

$E=P\times t$

where,

E = energy of electric hair dryer = ?

P = Power of electric hair dryer = 996 W

t = time taken = 5.0 min = 300 s     (Conversion factor:  1 min = 60 sec)

Putting values in above equation, we get:

$E=996\times 300=2,98,800J$

Hence, the energy drawn by electric hair dryer is 2,98,800 J

Answer 2

0.083kwh is the answer your welcome